patch applied (ghc): Get the InteractiveContext right when stopped at a breakpoint

[Simon Marlow]

Thu Apr 19 02:49:09 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * Get the InteractiveContext right when stopped at a breakpoint
  we shouldn't be binding 'it' until the computation has actually finished.

    M ./compiler/main/GHC.hs -18 +26
    M ./compiler/main/HscMain.lhs -2 +2